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From: "qrzhang at gatech dot edu" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/94567] New: wrong code at -O2 and -O3 on x86_64-linux-gnu Date: Sun, 12 Apr 2020 02:49:48 +0000 [thread overview] Message-ID: <bug-94567-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94567 Bug ID: 94567 Summary: wrong code at -O2 and -O3 on x86_64-linux-gnu Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: qrzhang at gatech dot edu Target Milestone: --- It's a recent regression. Bisection points to g:529ea7d9596b26ba103578eeab $ gcc-trunk -v gcc version 10.0.1 20200411 (experimental) [master revision bb87d5cc77d:75961caccb7:f883c46b4877f637e0fa5025b4d6b5c9040ec566] (GCC) $ gcc-trunk abc.c ; ./a.out 4 $ gcc-trunk -O2 abc.c ; ./a.out 0 $ cat abc.c volatile int a = 1, b; short c, d = 4, e = 53736, f = 2, g; int(h)(int i, int j) { return i && j ? 0 : i + j; } int main() { for (; a; a = 0) { unsigned short k = e; g = k >> 3; if (h(g < (f || c), b)) d = 0; } printf("%X\n", d); }
next reply other threads:[~2020-04-12 2:49 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-12 2:49 qrzhang at gatech dot edu [this message] 2020-04-14 6:41 ` [Bug rtl-optimization/94567] [10 Regression] " marxin at gcc dot gnu.org 2020-04-14 11:28 ` law at redhat dot com 2020-04-14 11:45 ` [Bug target/94567] " rguenth at gcc dot gnu.org 2020-04-14 11:48 ` rguenth at gcc dot gnu.org 2020-04-14 11:59 ` law at redhat dot com 2020-04-14 12:45 ` rguenth at gcc dot gnu.org 2020-04-14 13:20 ` law at redhat dot com 2020-04-15 9:57 ` rguenth at gcc dot gnu.org 2020-04-15 16:57 ` jakub at gcc dot gnu.org 2020-04-15 17:10 ` jakub at gcc dot gnu.org 2020-04-15 17:14 ` law at redhat dot com 2020-04-15 17:48 ` jakub at gcc dot gnu.org 2020-04-15 23:12 ` law at redhat dot com 2020-04-16 12:30 ` jakub at gcc dot gnu.org 2020-04-16 22:45 ` law at redhat dot com 2020-04-17 14:58 ` cvs-commit at gcc dot gnu.org 2020-04-17 15:11 ` jakub at gcc dot gnu.org
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